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From Chris Lu <>
Subject Re: Can Lucene be Used To Substitute Real Database?
Date Tue, 25 Oct 2005 21:12:03 GMT
First of all, just using Lucene to replace rdms is quite possible in
some specific cases.

In addition to updating and string/number issues, Lucene also lacks
many rdms functionalities. One of them is aggregation functions like
SUM(), or "group by".

Of course, in some case, you may be able to get around it by just
using Lucene's existing functionalities. But you will need to worry
about multi-threaded updating, Lucene index optimization, etc.

Chris Lu
Lucene Full-Text Search on Any Database

On 10/25/05, Daniel Naber <> wrote:
> On Dienstag 25 Oktober 2005 22:37, Sam Lee wrote:
> > Can Lucene to be used in place of mysql so that
> > website visitors can input data that will in turn
> > inserting row into Lucene just like mysql db?
> That's a bad idea. Lucene lacks a real update (you need to delete and
> re-add) and also sees everything as a string, even numbers. So although
> it's technically possible you don't want to do it.
> Regards
>  Daniel
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